1421624 has 16 divisors (see below), whose sum is σ = 2698920. Its totient is φ = 701920.

The previous prime is 1421621. The next prime is 1421627. The reversal of 1421624 is 4261241.

It is an interprime number because it is at equal distance from previous prime (1421621) and next prime (1421627).

It is a junction number, because it is equal to n+sod(n) for n = 1421596 and 1421605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407 + ... + 1734.

2^1421624 is an apocalyptic number.

It is an amenable number.

1421624 is a deficient number, since it is larger than the sum of its proper divisors (1277296).

1421624 is a wasteful number, since it uses less digits than its factorization.

1421624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230 (or 2226 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 1421624 is about 1192.3187493284. The cubic root of 1421624 is about 112.4419189905.

Adding to 1421624 its reverse (4261241), we get a palindrome (5682865).

The spelling of 1421624 in words is "one million, four hundred twenty-one thousand, six hundred twenty-four".